package Thread;

import java.util.concurrent.atomic.AtomicInteger;

public class Demo26 {

    //基于 CAS 实现 “ 原子类 ” (compareAndSwapInt)

//    public static int count = 0;

    //构造原子类对象
    public static AtomicInteger count = new AtomicInteger(0);

    public static void main(String[] args) throws InterruptedException {
        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
//                count++;
                count.getAndIncrement();//count++

//                count.incrementAndGet();//++count
//                count.getAndDecrement();//count--
//                count.decrementAndGet();//--count
//                count.getAndAdd(10);// += 10
            }
        });

        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
//                count++;
                count.getAndIncrement();
            }
        });

        t1.start();
        t2.start();
        t1.join();
        t2.join();

        //通过 count.get() 拿到原子类内部持有的真实数据
        System.out.println("count = " + count.get());
    }
}
